Answer:
The great cause of this law is that Americans have been fighting for equality on a legal level.
The signing of the 50th anniversary next July, opened "new doors of opportunity not only for blacks and whites, but also for women, Latinos, Asians, Native Americans, homosexuals and Americans with disabilities," Obama said today.
Step-by-step explanation:
It is seen as the historic civil rights struggle of the 1960s, but the fight for equality in the country began much earlier and is still reflected today in gay and immigrant rights activism.